Cannot save large files (> 2Mb) to network drive Hello, Well not really large files, files under 1 Mb or so save ok. Here's what's happening. I have a Win 7 64Bit PC that is 5 weeks old and is part of a domain. The first 10 days or so the system could open and save files to a network drive without a problem. Apparently either some software or update to the system changed the ability to save a file. Typically we work with 6 MB Excel 2010 spreadsheets (xls), takes less than a second to open the file. When we go to save it the system times out and gives an error message doucment not saved. Nothing shows up in the event logs. We can access the network drives without a problem (first time there is a delay). I have searched through a number of forums and have implemented different "fixes" to date I have made the following changes to the PC (not necessarily in this order): Clean Boot Download hotfix 981711 Not applicable (probably included in an update SP1). Disable SMB2\ Disable IPV6 Logged in as another user (new profile) Remove indexing for offline files Set Web Client service to Automatic and start. Tested DNS, ping and tracert resolves server name Start Excel in safe mode Other office programs have the same issue if the file is large > 2MB No errors in event log that look like they relate to the problem File saves locally without a problem Disabled SMB signing Looking at the resource monitor everything is quiet during the save, except there are occasional burst of disk and network activity. Memory usage holds steady between 35-40%. This is a Windows 7 64 bit PC, the other Windows 7 PCs are 32 bit and work fine. Windows XP works ok. Im out of ideas and searches that I have done have not yielded any additional ideas... Thanks, lalto Larry Altobelli

Hi lalto, First, please check whether you can use the command, such as Xcopy, Robocopy to copy the large file? Whether the NIC driver is updated and the firmware on your router in the latest? Whether other users with the same network got the same issue? Whether this issue only occurred using office programs. If this issue only happened when using Office programs, it is suggested to post this issue in Microsoft Office for further discussion. If the issue also occurred when copying other files, I suggest to perform these tests on Windows 7 network 1. Copy the file in the Safe Mode with Networking to see the result 2. Disable Autotuning: Open CMD as administrator, and input the command: Netsh interface tcp set global autotuning=disabled 3. Disable remote differential compression: Open Programs and Features, remove the feature Remote Different Compression 4. Modify link speed and duplex value in network adapter properties: Right click network adapter and choose properties, go to advanced tab, choose link speed& Duplex, select the value to Auto Negotiation 5. Clear DNS Cache: Ipconfig /flushdns In addition, here is one related article can be referred to. You cannot copy a large file and paste the file to a multi-core computer that is running Windows 7 when the computer contains a network adapter that does not support the RSS feature Hope this helps. Vincent Wang TechNet Community Support

Hi lalto, First, please check whether you can use the command, such as Xcopy, Robocopy to copy the large file? Whether the NIC driver is updated and the firmware on your router in the latest? Whether other users with the same network got the same issue? Whether this issue only occurred using office programs. If this issue only happened when using Office programs, it is suggested to post this issue in Microsoft Office for further discussion. If the issue also occurred when copying other files, I suggest to perform these tests on Windows 7 network 1. Copy the file in the Safe Mode with Networking to see the result 2. Disable Autotuning: Open CMD as administrator, and input the command: Netsh interface tcp set global autotuning=disabled 3. Disable remote differential compression: Open Programs and Features, remove the feature Remote Different Compression 4. Modify link speed and duplex value in network adapter properties: Right click network adapter and choose properties, go to advanced tab, choose link speed& Duplex, select the value to Auto Negotiation 5. Clear DNS Cache: Ipconfig /flushdns In addition, here is one related article can be referred to. You cannot copy a large file and paste the file to a multi-core computer that is running Windows 7 when the computer contains a network adapter that does not support the RSS feature Hope this helps. Vincent Wang TechNet Community Support

Hi Vincent, Although your suggestions did not resolve the issue it did point the way. I worked my way through your first three sugestions with little change in the copy time. In reference to item 4, what I found was that the card was already set to "Auto Negotiation". I changed the setting to 100 MB Full Duplex and my save times using robocopy went from 40-57 sec down to 3-4 sec. The NIC chipset was Realtek PCIe GBe Network Adapter. This system is connected to a gigabit switch. Cabling is CAT 6. Other systems (mostly XP) with both 100MB and 1 GB cards do not display the problem. Another new system in the same Dell family, with the same Realtek chipset had the same issue. Changing that system to 100 MB Full Duplex also resolved the issue. I am taking a guess here, but it looks as if the Realtek chipset and the gigabit switch could not stop auto negotiating. I do not know the switch manufacturer, but I will try to get it and post it Lalto Larry Altobelli The 2 switches in use are Netgear GS748TS and GS748AT.

Hi Vincent, Although your suggestions did not resolve the issue it did point the way. I worked my way through your first three sugestions with little change in the copy time. In reference to item 4, what I found was that the card was already set to "Auto Negotiation". I changed the setting to 100 MB Full Duplex and my save times using robocopy went from 40-57 sec down to 3-4 sec. The NIC chipset was Realtek PCIe GBe Network Adapter. This system is connected to a gigabit switch. Cabling is CAT 6. Other systems (mostly XP) with both 100MB and 1 GB cards do not display the problem. Another new system in the same Dell family, with the same Realtek chipset had the same issue. Changing that system to 100 MB Full Duplex also resolved the issue. I am taking a guess here, but it looks as if the Realtek chipset and the gigabit switch could not stop auto negotiating. I do not know the switch manufacturer, but I will try to get it and post it Lalto Larry Altobelli